MANUFACTURE OF DYNAMIC PRESSURE BEARING DEVICE

摘要

PROBLEM TO BE SOLVED: To form a groove for dynamic pressure generation highly accurately and efficiently, while forming a good lubricating coating surface to the dynamic pressure surface in a shaft body or a shaft fitting body. SOLUTION: At least on one side surface of both dynamic pressure bearing surfaces of a shaft body 21 and a shaft fitting body 31, a lubricating membrane is formed by an electrodepositing coating, and a groove for dynamic pressure generation 25 is formed to the electro-depositing coating membrane by an Exima-rasar processing. As a result, the lubricating membrane can be obtained in the all peripheral even layer thickness by the even coating operation of the electrodepositing coating, and at the same time, the groove processing can be a carried out at a high accuracy by a simple process, without generating burrs as in the conventional mechanical processing.